remoting/webapp/hangout_session.js

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 /**
   6  * @fileoverview
   7  * Class to communicate with the background scripts via chrome runtime
   8  * messages to
   9  * 1. Forward session state notifications
  10  * 2. Closes the window when the session terminates
  11  */
  12
  13 'use strict';
  14
  15 /** @suppress {duplicate} */
  16 var remoting = remoting || {};
  17
  18 /**
  19  * @constructor
  20  * @param {string} senderId id of the current tab or window.
  21  */
  22 remoting.HangoutSession = function(senderId) {
  23   /**
  24    * @private
  25    * @type {chrome.runtime.Port}
  26    */
  27   this.port_ = null;
  28
  29   /**
  30    * @private
  31    * @type {string}
  32    */
  33   this.senderId_ = senderId;
  34 };
  35
  36 remoting.HangoutSession.prototype.init = function() {
  37   var portName = 'it2me.helper.webapp@' + this.senderId_;
  38   this.port_ = chrome.runtime.connect({name: portName});
  39
  40   remoting.hangoutSessionEvents.addEventListener(
  41       remoting.hangoutSessionEvents.sessionStateChanged,
  42       this.onSessionStateChanged_.bind(this));
  43 };
  44
  45 /**
  46  * @param {remoting.ClientSession.State} state
  47  */
  48 remoting.HangoutSession.prototype.onSessionStateChanged_ = function(state) {
  49   var State = remoting.ClientSession.State;
  50   try {
  51     this.port_.postMessage({method: 'sessionStateChanged', state: state});
  52   } catch (e) {
  53     // postMessage will throw an exception if the port is disconnected.
  54     // We can safely ignore this exception.
  55     var error = /** @type {Error} */ e;
  56     console.error(error);
  57   } finally {
  58     if (state === State.FAILED || state === State.CLOSED) {
  59       // close the current window
  60       if (base.isAppsV2()) {
  61         chrome.app.window.current().close();
  62       } else {
  63         window.close();
  64       }
  65     }
  66   }
  67 };
  68
  69
  70 /**
  71  * remoting.clientSession does not exist until the session is connected.
  72  * hangoutSessionEvents serves as a global event source to plumb session
  73  * state changes until we cleanup clientSession and sessionConnector.
  74  * @type {base.EventSource}
  75  */
  76 remoting.hangoutSessionEvents = new base.EventSource();
  77
  78 /** @type {string} */
  79 remoting.hangoutSessionEvents.sessionStateChanged = "sessionStateChanged";
  80
  81 remoting.hangoutSessionEvents.defineEvents(
  82     [remoting.hangoutSessionEvents.sessionStateChanged]);